The bitterness of the avuncular factions was now intensified. The House of Burgundy by marriage and other means had grown to be one of the most powerful in Europe and was at bitter enmity with the House of Orleans. At the death of Philip the Bold, Duke of Burgundy, his son Jean sans Peur, sought to assume his father’s supremacy as well as his title: the Duke of Orleans, strong in the queen’s support, determined to foil his purpose. Each fortified his hôtel in Paris and assembled an army. Friends, however, intervened; they were reconciled, and in November 1407 the two dukes attended mass at the Church of the Grands Augustins, took the Holy Sacrament and dined together. As Jean rose from table the Duke of Orleans placed the Order of the Porcupine round his neck; swore bonne amour et fraternité, and they kissed each other with tears of joy. On 23rd November a forged missive was handed to the Duke of Orleans, requiring his attendance on the queen at the Hôtel St. Paul, whither he often went to visit her. He set forth, attended only by two squires and five servants carrying torches. It was a sombre night, and as the unsuspecting prince rode up the Rue Vieille du Temple behind his little escort, humming a tune and playing with his glove, a band of assassins fell upon him from the shadow of the postern La Barbette,[87] crying “à mort, à mort,” and he was hacked to death. Then issued from a neighbouring house at the sign of Our Lady, a tall figure concealed in a red cloak, lantern in hand, who gazed at the mutilated corpse. “C’est bien,” said he, “let’s away.” They set fire to the house to divert attention and escaped. Four months before, Jean sans Peur had hired the house on the pretext of storing provisions, and for two weeks a score of assassins had been concealed there, biding their time. On the morrow, Jean with the other princes went to asperse the dead body with holy water in the church of the Blancs Manteaux, and as he drew nigh, exclaiming against the foul murder, blood is said to have issued from the wounds. At the funeral Jean held a corner of the pall, but his guilt was an open secret, and though he braved it out for a time he was forced to flee to his lands in Flanders for safety. In a few months, however, he was back in force at Paris, and a doctor of the Sorbonne pleaded an elaborate justification of the deed before the assembled princes, nobles, clergy and citizens at the Hôtel St. Paul. The poor demented king was made to declare publicly that he bore no ill-will to his dear cousin of Burgundy and later, on the failure of a conspiracy of revenge by the queen and the Orleans party, to grant full pardon for a deed “committed for the welfare of the kingdom.” The cutting of the Rue Etienne Marcel has exposed the strong machicolated tower still bearing the arms of Burgundy (two planes and a plumb line), which Jean sans Peur built to fortify the Hôtel de Bourgogne, as a defence and refuge against the Orleans faction and the people of Paris. The Orleans family had for arms a knotted stick, with the device “Je l’ennuis”: the Burgundian arms with the motto, “Je le tiens,” implied that the knotted stick was to be planed and levelled.
The arrival of Jean sans Peur, and the fortification of his hôtel were the prelude to civil war, for the Orleanists and their allies had rallied to the Count of Armagnac, whose daughter the new Duke of Orleans had married, and fortified themselves in their stronghold on the site now occupied by the Palais Royal.
The Armagnacs, for so the Orleanists were now called, thirsted for revenge, and for five years Paris was the scene of frightful atrocities as each faction gained the upper hand and took a bloody vengeance on its rivals. At length the infamous policy of an alliance with the English was resorted to. The temptation was too great for the English king, and in 1415 Henry V. met the French army, composed almost entirely of the Armagnacs, at Agincourt, and inflicted on it a defeat more disastrous than Crecy or Poitiers. The famous oriflamme of St. Denis passed from history in that fatal year of 1415. The Count of Armagnac hurried to Paris, seized the mad king and the Dauphin, and held the capital.